Liquid crystal display device and method of driving the same

ABSTRACT

A liquid crystal display device includes an image display part formed on a first substrate where data lines and gate lines are vertically and horizontally arranged, respectively, to intersect each other, a plurality of gate tape carrier packages having a gate driving integrated circuit for driving the gate lines, a plurality of data tape carrier packages having a data driving integrated circuit for driving the data lines, a plurality of conductive lines formed at an outer side of the image display part of the first substrate for supplying gate driving signals to the gate driving integrated circuits, a first control signal line formed together with the conductive lines for supplying a first control signal to the gate driving integrated circuits so that the gate lines of the image display part may be sequentially driven from the first one to the last one, a second control signal line formed together with the conductive lines for supplying a second control signal to the gate driving integrated circuits so that the gate lines of the image display part may be sequentially driven from the last one to the first one, and a first controller for supplying the first and second control signals to the first and second control signal lines.

[0001] The present invention claims the benefit of Korean PatentApplication No. P2002-088475 filed in Korea on Dec. 31, 2002, which ishereby incorporated by reference.

BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to a display device and, moreparticularly to a liquid crystal display device and a method of drivinga liquid crystal display device.

[0004] 2. Discussion of the Related Art

[0005] In general, a liquid crystal display device displays images byindividually supplying data signals to liquid crystal cells arranged ina matrix configuration and controlling light transmittance of the liquidcrystal cells. Accordingly, the liquid crystal display device includes aliquid crystal display panel with the liquid crystal cells by the unitof a pixel arranged in the matrix configuration and a driving circuitfor driving the liquid crystal cells.

[0006] The liquid crystal display panel includes a color filtersubstrate and a thin film transistor array substrate attached togetherwith a certain gap therebetween, and a liquid crystal material layerformed in the gap between the color filter substrate and the thin filmtransistor array substrate. On the thin film transistor array substrateof the liquid crystal display panel, a plurality of data linestransmitting image information to the liquid crystal cells and aplurality of gate lines transmitting a scan signal to the liquid crystalcells intersect, and liquid crystal cells are defined at everyintersection of the data lines and gate lines. A common electrode and apixel electrode are formed at each of facing inner surfaces of the colorfilter substrate and the thin film transistor array substrate to supplyan electric field to the liquid crystal layer. The pixel electrode isformed at every liquid crystal cell of the thin film transistor arraysubstrate, while the common electrode is integrally formed along anentire surface of the color filter substrate. Accordingly, bycontrolling voltages supplied to the pixel electrode when the commonelectrode receives a voltage, light transmittance of liquid crystalcells may be individually controlled.

[0007] In order to control the voltage supplied to the pixel electrodeby liquid crystal cells, each liquid crystal cell includes a thin filmtransistor applied as a switching device. The driving circuit includes agate driving unit supplying a scan signal to the gate lines, a datadriving unit supplying image information to the data lines, a timingcontroller controlling a driving timing of the gate driving unit and thedata driving unit, and a power supply unit supplying various drivingvoltages used for a liquid crystal display device.

[0008] The timing controller controls a driving timing of the gatedriving unit and the data driving unit through image information and acontrol signal supplied from an external graphic processor. The timingcontroller also supplies image information to the data driving unit.

[0009] The power supply unit generates driving voltages, such as acommon voltage (Vcom), a gate high voltage (Vgh), a gate low voltage(Vgl) or a gamma reference voltage (Vref) used for the liquid crystaldisplay device by using power supplied from the external graphicprocessor. The power supply unit supplies the driving voltages to thegate driving unit, the data driving unit, a gamma voltage generator, andthe liquid crystal display panel.

[0010] The gate driving unit sequentially supplies scan signals to thegate lines so that the liquid crystal cells arranged in the matrixconfiguration can be selected line-by-line, and image information issupplied to the liquid crystal cells of the selected one line from thedata driving unit by way of the data lines.

[0011] When the image information is individually supplied to the pixelelectrode of the liquid crystal cells and the common voltage (Vcom) issupplied to the common electrode, a voltage difference occurs betweenthe pixel electrode and the common electrode, according to which anelectric field is supplied to the liquid crystal material layer. Thus,light transmittance of the liquid crystal cells are individuallycontrolled to display a desired image.

[0012] The data driving unit and the gate driving unit, which aredirectly connected to the liquid crystal display panel, are integratedwith a plurality of integrated circuits (IC). The data driving ICs andthe gate driving ICs are respectively mounted on a tape carrier package(TCP) and connected to the liquid crystal display panel in a tapeautomated bonding (TAB) method, or the data driving ICs and the gatedriving ICs are respectively mounted on the liquid crystal display panelin a chip on glass (COG) method.

[0013] The data driving ICs and gate driving ICs mounted on the TCP andconnected to the liquid crystal display panel in the TAB method receivecontrol signals and DC voltages input from outside through signal linesmounted on a printed circuit board (PCB) connected to the TCP and areconnected to each other. That is, the data driving ICs are connected inseries to each other through the signal lines mounted on the data PCBand receive image information, control signals and drive voltagesapplied from the timing controller and the power supply unit.

[0014] The gate driving ICs are connected in series to each otherthrough signal lines mounted on the gate PCB and receive control signalsand driving voltages supplied from the timing controller and the powersupply unit.

[0015]FIG. 1 is a schematic plan view of a liquid crystal display deviceaccording to the related art. In FIG. 1, a liquid crystal display deviceincludes a liquid crystal display panel 1, a plurality of data TCPs 8connected between one longer side of the liquid crystal display panel 1and a data PCB 12, a plurality of gate TCPs 14 connected between oneshorter side of the liquid crystal display panel 1 and a gate PCB 13,data driving ICs 10 respectively mounted at the data TCPs 8, and gatedriving ICs 16 respectively mounted at the gate TCPs 14.

[0016] The liquid crystal display panel 1 is formed as a thin filmtransistor (TFT) array substrate 2 and a color filter (CF) substrate 4attached together and facing each other with a certain gap therebetween,and a liquid crystal material layer (not shown) is formed in the gap.

[0017] The one shorter side and one longer side of the TFT arraysubstrate 2 protrudes compared with the CF substrate 4, and a gate padpart and a data pad part are provided at the protruded region of the TFTarray substrate 2. At the region where the TFT array substrate 2 and theCF substrate 4 are attached together, an image display part 21 is formedon which pixels are arranged in a matrix configuration. At the imagedisplay part 21 of the TFT array substrate 2, a plurality of gate lines20 are arranged horizontally and connected to the gate pad part, and aplurality of data lines 18 are arranged vertically and connected to thedata pad part. Accordingly, the gate lines 20 and the data lines 18intersect, and pixels having a TFT and a pixel electrode areindividually provided at the intersection and arranged in a matrix form.

[0018] At the image display part 21 of the CF substrate 4, there areprovided red, green, and blue color filters coated by a black matrix,and a common electrode forming an electric field at the liquid crystalmaterial layer together with the pixel electrode provided at the TFTarray substrate 2.

[0019] An input pad 24 and an output pad 25 electrically connected tothe data driving ICs 10 are formed at the data TCPs 8. The input pad 24of the data TCPs 8 is electrically connected to the data PCB 12, and theoutput pad 25 of the data TCPs 8 is electrically connected to the datapad part of the thin film transistor array substrate 2. The data drivingICs 10 convert digital signals into analog signals and supply them tothe data lines 18 of the liquid crystal display panel 1.

[0020] An input pad 28 and an output pad 29 electrically connected tothe gate driving ICs 16 are formed at the gate TCPs 14. The input pad 28of the gate TCPs 14 is electrically connected to the gate PCB 13, whilethe output pad 29 of the gate TCPs 14 is electrically connected to thegate pad part of the thin film transistor array substrate 2.

[0021] The gate driving ICs 16 sequentially supply the scan signal tothe gate lines 20 of the liquid crystal display panel 1. The data PCB 12and the gate PCB 13 respectively include connectors 55 and 65 to receivecontrol signals and driving voltages through a flexible plate cable(FPC) 70 from outside.

[0022] In general, the liquid crystal display device shows changedpicture quality characteristics depending on a main viewing angle atwhich a viewer views a screen. For example, for a liquid crystal displaydevice applied to a notebook computer, its main viewing angle isdetermined by a direction that a viewer views a screen from an upperside as much as a predetermined angle on the basis of a directionvertical to the screen. When a liquid crystal display panel is installedwith a certain height at a public place or a public traffic means (i.e.,bus, train, or airplane), its main viewing angle is determined by adirection that a viewer views a screen from a lower side as much as acertain angle on the basis of a direction vertical to a screen.

[0023] Meanwhile, when a liquid crystal display device is applied to anaudio/visual system or various information displays installed between adriver's seat and a passenger's seat, its main viewing angle isdetermined by a direction that a viewer views a screen from a left sideor a right side as much as a certain angle on the basis of a directionvertical to the screen. Accordingly, the liquid crystal display deviceis fabricated such that an image is horizontally and vertically reversedaccording to a usage environment.

[0024] In order to reverse an image of the liquid crystal display devicevertically or horizontally, the liquid crystal display device includes afirst controller 51 provided at the gate PCB 13, which applyies a firstcontrol signal (UP/DOWN) to the gate driving ICs 16 through the gateTCPs 14 to vertically reverse an image displayed on the image displaypart 21 of the liquid crystal display panel 1, and a second controller52 provided at the data PCB 12, which applyies a second control signal(LEFT/RIGHT1) to the data driving ICs 10 through the data TCPs 8 tohorizontally reverse an image displayed on the image display part 21 ofthe liquid crystal display panel 1.

[0025]FIGS. 2A to 2C are schematic diagrams showing normal, reversed,and inverted images as displayed on an image display part of a liquidcrystal display panel according to the related art. First, withreference to FIG. 2A, when the first control signal (UP/DOWN1) with ahigh potential is supplied to the gate driving ICs 16 through the gateTCPs 14 and the second control signal (LEFT/RIGHT1) with a low potentialis supplied to the data driving ICs 10 through the data TCPs 8, gatelines 18 provided at the image display part 21 are sequentially drivenfrom the first one to the last one. Image information is thus applied bythe unit of the gate line from the left side to the right side from thedata driving ICs 10 through the data TCPs 8, whereby an image isnormally displayed on the image display part 21.

[0026] With reference to FIG. 2B, when the first control signal(UP/DOWN1) with a high potential is supplied to the gate driving ICs 16through the gate TCPs 14 and the second control signal (LEFT/RIGHT1)with a high potential is applied to the data driving ICs 10 through thedata TCPs 8, the gate lines 18 provided at the image display part 21 aresequentially driven from the first one to the last one. Imageinformation is thus supplied from the right side to the left side fromthe data driving ICs 10 through the data TCPs 8, whereby an image isreversed and displayed on the image display part 21. 10025With referenceto FIG. 2C, when the first control signal (UP/DOWN1) with a lowpotential is supplied to the gate driving ICs 16 through the gate TCPs14 and the second control signal (LEFT/RIGHT1) with a low potential issupplied to the data driving ICs 10 through the data TCPs 8, the gatelines 18 provided at the image display part 21 are sequentially drivenfrom the last one to the first one. Thus, image information is suppliedfrom the left side to the right side from the data driving ICs 10through the data TCPs 8, whereby an image is inverted and displayed onthe image display part 21.

[0027] However, because the connectors 55 and 65 are respectively formedat the data PCB 12 and the gate PCB 13 and control signals and drivingvoltages are received through the FPC 70 from outside, the liquidcrystal display device has the following problems. First, as theconnectors 55 and 65 are respectively formed on the thin data PCB 12 andthe thin gate PCB 13, the thickness of the liquid crystal display deviceis inevitably increased as high as the connectors 55 and 65, which makesit difficult to obtain a thin liquid crystal display device.

[0028] Second, because the FPC 70 needs to be installed to electricallyconnect the connectors 55 and 65, the number of processes forfabrication of a liquid crystal display device increases a unit cost ofthe liquid crystal display device also increases.

[0029] In order to avoid such problems, there has been proposed atechnique to mount lines supplying control signals and drive voltages tothe data PCB 12 and the gate PCB 13 are mounted at an outer dummy regionof the thin film transistor array substrate 2 so that either the dataPCB 12 or the gate PCB 13 can be removed. Accordingly, since the gatedriving IC 16 needs fewer signals than the data driving IC 10, the gatePCB 13 is commonly removed.

[0030] In other words, the gate driving ICs 16 connected to the liquidcrystal display panel 1 by the TAB method receive control signals and DCvoltages from the data PCB 12 through line-on-glass (LOG) lines mountedon the thin film transistor array substrate 2 of the liquid crystaldisplay panel 1, and are connected to each other.

[0031]FIG. 3 is a schematic plan view of a liquid crystal display devicewithout a gate PCB according to the related art. In FIG. 3, a liquidcrystal display device includes a liquid crystal display panel 101, aplurality of data TCPs 108 connected between one longer side of theliquid crystal display panel 101 and a data PCB 112, a plurality of gateTCPs 114 connected to one shorter side of the liquid crystal displaypanel 101, data driving ICs 110 mounted at each of the data TCPs 108,and gate driving ICs 116 mounted at each of the gate TCPs 114.

[0032] The liquid crystal display panel 101 is formed as a TFT arraysubstrate 102 and a CF substrate 104 are attached together and face eachother with a certain gap therebetween, and a liquid crystal materiallayer (not shown) is formed in the gap. The one shorter side and onelonger side of the TFT array substrate 102 protrudes as compared withthe CF substrate 104, and a gate pad part and a data pad part areprovided at the protruded region of the TFT array substrate 102.

[0033] At the region where the TFT array substrate 102 and the CFsubstrate 104 are attached together, an image display part 121 is formedon which pixels are arranged in a matrix form. At the image display part121 of the TFT array substrate 102, a plurality of gate lines 120 arearranged horizontally and connected to the gate pad part, and aplurality of data lines 118 are arranged vertically and connected to thedata pad part. Accordingly, the gate lines 120 and the data lines 118intersect, and pixels having a TFT and a pixel electrode areindividually provided at the intersection and arranged in a matrix form.

[0034] At the image display part 121 of the CF substrate 104, there areprovided red, green, and blue color filters coated by a black matrix,and a common electrode forming an electric field at the liquid crystallayer together with a pixel electrode provided at the TFT arraysubstrate 102. The gate pad part and the data pad part provided at theprotruded region of the TFT array substrate 102 are formed to correspondto the image display part 121. Thus, the comer portion where one shorterside and one longer side of the TFT array substrate 102 meet is a dummyregion that is not used. But recently, LOG lines 126 are formed at thecomer portion to supply control signals and driving voltages to the gatedriving ICs 116.

[0035] Input pads 124 and output pads 125 electrically connected to thedata driving IC 110 are formed at the data TCP 108. The input pads 124of the data TCP 108 are electrically connected to the data PCB 112, andthe output pads 125 of the data TCP 108 are electrically connected tothe data pad part of the TFT array substrate 102.

[0036] A first data TCP 108 includes a gate signal transmission line 122electrically connected to the LOG lines 126 mounted at the TFT arraysubstrate 102. The gate signal transmission line 122 transmits gatecontrol signals and gate driving voltages supplied from a timingcontroller and a power supply unit via the data PCB 112 to the LOG lines126.

[0037] The data driving ICs 110 convert digital signals into analogsignals and supply them to the data lines 118 of the liquid crystaldisplay panel 101. At the gate TCP 114, gate driving ICs 116 aremounted, and in addition, gate signal transmission lines 128electrically connected to the gate driving ICs 116 and output pads 130are formed.

[0038] The gate signal transmission lines 128 are electrically connectedto the LOG lines 126 mounted on the TFT array substrate 102, and theoutput pads 130 are electrically connected to the gate pad part of theTFT array substrate 102. The gate driving ICs 116 sequentially supply ascan signal, such as a gate high voltage signal (Vgh) and a gate lowvoltage signal (Vgl), to the gate lines 120 in response to gate controlsignals and gate driving voltages applied through the LOG lines 126 andthe gate signal transmission lines 128.

[0039] Each LOG line 126 supplies DC voltage signals, such as the gatehigh voltage signal (Vgh), the gate low voltage signal (Vgl), a commonvoltage signal (Vcom), a ground signal (GND), and a power supply voltagesignal (Vdd), supplied from a power supply unit and gate controlsignals, such as a gate start pulse (GSP), a gate shift clock (GSC), anda gate enable signal (GOE), supplied from the timing controller. The LOGlines 126 are patterned at the same time as when the gate lines and thegate electrodes are formed on the thin film transistor array substrate102.

[0040] However, the related art of the liquid crystal display devicewithout the PCB has the following problem. By applying the gate startpulse (GSP) to the gate driving IC through the line-on-glass line, thegate lines of the image display part may be sequentially driven from thefirst one to the last one, but conversely, it is not possible to drivethe gate lines of the image display part from the last one to the firstone. Therefore, because the vertical reversing of an image is notpossible, it is limited to a usage environment.

SUMMARY OF THE INVENTION

[0041] Accordingly, the present invention is directed to a liquidcrystal display device that substantially obviates one or more of theproblems due to limitations and disadvantages of the related art.

[0042] An object of the present invention is to provide a liquid crystaldisplay device having images that can be inverted and reversed.

[0043] Another object of the present invention is to provide a method ofdriving a liquid crystal display device having images that can beinverted and reversed.

[0044] To achieve these and other advantages and in accordance with thepurpose of the present invention, as embodied and broadly describedherein, a liquid crystal display device includes an image display partformed on a first substrate where data lines and gate lines arevertically and horizontally arranged, respectively, to intersect eachother, a plurality of gate tape carrier packages having a gate drivingintegrated circuit for driving the gate lines, a plurality of data tapecarrier packages having a data driving integrated circuit for drivingthe data lines, a plurality of conductive lines formed at an outer sideof the image display part of the first substrate for supplying gatedriving signals to the gate driving integrated circuits, a first controlsignal line formed together with the conductive lines for supplying afirst control signal to the gate driving integrated circuits so that thegate lines of the image display part may be sequentially driven from thefirst one to the last one, a second control signal line formed togetherwith the conductive lines for supplying a second control signal to thegate driving integrated circuits so that the gate lines of the imagedisplay part may be sequentially driven from the last one to the firstone, and a first controller for supplying the first and second controlsignals to the first and second control signal lines.

[0045] In another aspect, a method of driving a liquid crystal displaydevice includes providing a plurality of gate tape carrier packageshaving a gate driving integrated circuit for driving a plurality of gatelines, providing a plurality of data tape carrier packages having a datadriving integrated circuit for driving a plurality of data lines,providing a plurality of conductive lines at an outer side of an imagedisplay part of a first substrate for supplying gate driving signals tothe gate driving integrated circuits, and supplying a first controlsignal to the gate driving integrated circuits using a first controlline so that the gate lines of the image display part may besequentially driven from the last one to the first one.

[0046] In another aspect, a method of driving a liquid crystal displaydevice includes providing a liquid crystal display device including animage display part formed on a first substrate where data lines and gatelines are vertically and horizontally arranged, respectively, tointersect each other, a plurality of gate tape carrier packages having agate driving integrated circuit for driving the gate lines, a pluralityof data tape carrier packages having a data driving integrated circuitfor driving the data lines, and a plurality of conductive lines mountedat an outer side of the image display part of the first substrate forsupplying gate driving signals to the gate driving integrated circuits,and supplying a first control signal to the gate driving integratedcircuits using a first control line so that the gate lines of the imagedisplay part may be sequentially driven from the last one to the firstone.

[0047] It is to be understood that both the foregoing generaldescription and the following detailed description are exemplary andexplanatory and are intended to provide further explanation of theinvention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings, which are included to provide afurther understanding of the invention and are incorporated in andconstitute a part of this specification, illustrate embodiments of theinvention and together with the description serve to explain theprinciples of the invention. In the drawings:

[0049]FIG. 1 is a schematic plan view of a liquid crystal display deviceaccording to the related art;

[0050]FIGS. 2A to 2C are schematic diagrams showing normal, reversed,and inverted images as displayed on an image display part of a liquidcrystal display panel according to the related art;

[0051]FIG. 3 is a schematic plan view of a liquid crystal display devicewithout a gate PCB according to the related art;

[0052]FIG. 4 is a schematic plan view of an exemplary liquid crystaldisplay device according to the present invention;

[0053]FIG. 5 is a schematic plan view of another exemplary liquidcrystal display device according to the present invention; and

[0054]FIG. 6 is a schematic circuit diagram of an exemplary data PCB ofFIGS. 4 and 5 according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0055] Reference will now be made in detail to the illustratedembodiments of the present invention, examples of which are illustratedin the accompanying drawings.

[0056]FIG. 4 is a schematic plan view of an exemplary liquid crystaldisplay device according to the present invention. In FIG. 4, a liquidcrystal display device may include a liquid crystal display panel 201,first to M-th data TCPs 208A to 208M connected between one longer sideof the liquid crystal display panel 201 and a data PCB 212, first toN-th gate TCPs 214A to 214N connected to one shorter side of the liquidcrystal display panel 201, first to M-th data driving ICs 210A to 210Mmounted at first to M-th data TCPs 208A to 208M, and first to N-th gatedriving ICs 216A to 216N mounted at first to N-th gate TCPs 214A to214N.

[0057] At an outer side of an image display part 221 of the liquidcrystal display panel 201, first and second control signal lines CSL211and CSL212 may be mounted to be respectively connected between the firstdata TCP 208A and first to N-th gate TCP 214A to 214N. In addition, acontroller (not shown) may be provided in the data PCB 212 to supplyfirst and second control signals to the first and second control signallines CSL211 and CSL212.

[0058] The liquid crystal display panel 201 may be formed as a TFT arraysubstrate 202 and a CF substrate 204 may be attached together and faceeach other with a certain gap therebetween, and a liquid crystalmaterial layer (not shown) may be formed in the gap. The one shorterside and one longer side of the TFT array substrate 202 may protrude, ascompared with the CF substrate 204, and a gate pad part and a data padpart may be provided at the protruding region of the TFT array substrate202.

[0059] At the region where the TFT array substrate 202 and the CFsubstrate 204 are attached together, an image display part 221 may beformed upon which pixels may be arranged in a matrix configuration. Atthe image display part 221 of the TFT array substrate 202, a pluralityof gate lines may be arranged horizontally and may be connected to thegate pad part, and a plurality of data lines may be arranged verticallyand may be connected to the data pad part. Accordingly, the gate linesand the data lines intersect, and pixels having a TFT and a pixelelectrode may be individually provided at the intersection and may bearranged in a matrix configuration. At the image display part 221 of theCF substrate 204, there are provided red, green, and blue color filterscoated by a black matrix, and a common electrode forming an electricfield at the liquid crystal material layer together with a pixelelectrode provided at the TFT array substrate 202.

[0060] The gate pad part and the data pad part provided at the protrudedregion of the TFT array substrate 202 may be formed to correspond to theimage display part 221. Accordingly, at the comer portion where oneshorter side and one longer side of the TFT array substrate 202 meet,LOG lines may be mounted to transmit gate control signals and gatedriving voltages to first to N-th gate driving ICs 214A to 214N.

[0061] Input pads and output pads electrically connected to first toM-th data driving ICs 210A to 210M may be formed at first to M-th dataTCPs 208A to 208M and may be electrically connected to the data PCB 212and the data pad part of the TFT array substrate 202. In addition, gatesignal transmission lines may be formed at the first data TCP 208A thatare electrically connected to the LOG lines mounted on the thin filmtransistor array substrate 202. The gate signal transmission lines maytransmit gate control signals and gate driving voltages supplied from atiming controller and a power supply unit via the data PCB 212 to theLOG lines.

[0062] The first to M-th data driving ICs 210A to 210M may convert imageinformation, i.e., digital signals, into analog signals and may supplythem to the data lines of the liquid crystal display panel 201. Thefirst to N-th gate TCPs 214A˜214N may be electrically connected to thegate pad part of the thin film transistor array substrate 202 throughthe output pads electrically connected to first to N-th gate driving ICs216A to 216N.

[0063] The first to N-th gate TCPs 214A to 214N may include gate signaltransmission lines connected between the LOG lines of the thin filmtransistor array substrate 202 and first to N-th gate driving ICs 216Ato 216N. The first to N-th gate driving ICs 216A to 216N maysequentially supply scan signals, such as a gate high voltage signal(Vgh) and a gate low voltage signal, to the gate lines in response togate control signals and gate driving voltages supplied through the LOGlines and the gate signal transmission lines.

[0064] LOG lines supply DC voltage signals, such as the gate highvoltage signal (Vgh), the gate low voltage signal (Vgl), a commonvoltage signal (Vcom), a ground signal (GND), and a power supply voltagesignal (Vdd), supplied from a power supply unit and gate controlsignals, such as a gate start pulse (GSP), a gate shift clock (GSC), anda gate enable signal (GOE), supplied from the timing controller. The LOGlines may be patterned at the same time when the gate lines and the gateelectrodes are formed on the thin film transistor array substrate 202.

[0065] According to the present invention, in order to sequentiallydrive the gate lines of the image display part 221 from the last one tothe first one, the first and second control signal lines CSL211 andCSL212 may be formed along with the LOG lines. The first control signalline CSL211 may be provided at the existing LOG lines and may transmitthe gate start pulse (GSP) as a first control signal. That is, the firstcontrol signal line may not be additionally provided in the presentinvention. Accordingly, the first control signal line CSL211 maysequentially supply the gate start pulse (GSP) to the first to N-th gatedriving ICs 216A to 216N to sequentially drive the gate lines of theimage display part 221 from the first one to the last one.

[0066] In addition, the second control line CSL212 may be added in thepresent invention to transmit the second control signal. By supplyingthe second control signal to the N-th gate driving IC 216N, gate linesmay be sequentially driven from the last one to the first one connectedto the N-th gate driving IC 216N. After the first gate line connected tothe N-th gate driving IC 216N is driven, the second control signal maybe supplied to the (N−1)th gate driving IC 216N−1 through the firstcontrol signal line CSL211 to sequentially drive gate lines from thelast one to the first one connected to the (N−1)th gate driving IC216N−1.

[0067] Accordingly, the second control signal may be sequentiallyapplied to the (N−1)th, (N−2)th, . . . , the second, the first gatedriving ICs (216N−1, 216N−2, . . . , 216B, 216A) through the firstcontrol signal line CSL211 to sequentially drive gate lines of the imagedisplay part 221 from the last one to the first one.

[0068]FIG. 5 is a schematic plan view of another exemplary liquidcrystal display device according to the present invention. In FIG. 5,when the N-th gate driving IC 216N has the same internal line pattern asthat of the other gate driving ICs 216A to 216N−1, the second controlsignal line CSL212 may not be connected to the N-th gate driving IC 216Nand thus the second control signal may not be supplied to the N-th gatedriving IC 216N.

[0069] Thus, when the N-th gate driving IC 216N has the same internalline pattern as that of the other gate driving ICs 216A to 216N−1, ashorting line SL211 may be provided at an edge of the liquid crystaldisplay panel 201 to electrically connect an end of the first controlsignal line CSL211 and an end of the second control signal line CSL212extended from the N-th gate driving IC 216N. The shorting line SL211 maysupply the second control signal supplied through the second controlsignal line CSL212 to the N-th gate driving IC 216N through the firstcontrol signal line CSL211, so that gate lines of the image display part211 may be sequentially driven from the last one to the first one.

[0070]FIG. 6 is a schematic circuit diagram of an exemplary data PCB ofFIGS. 4 and 5 according to the present invention. In FIG. 6, the firstcontroller 213 provided in a data PCB 212 may transmit first and secondcontrol signals UP/DOWN211 and UP/DOWN212 through a first data TCP 208A,in order to sequentially drive the gate lines of the image display part211 from the first one to the last one or from the last one to the firstone, to reverse an image vertically (that is, up and down).

[0071] In addition, the first controller 213 may transmit a thirdcontrol signal LEFT/RIGHT 211 to the first data driving IC 210A and M-thdata driving IC 210M respectively mounted at a first data TCP 208A andM-th data TCP 208M, to reverse an image of the image display part 221horizontally (that is, right and left).

[0072] Accordingly, the liquid crystal display device of the presentinvention has such an advantage that an image of the liquid crystaldisplay device may be reversed up and down even without the gate PCB bytransmitting the first and second control signals generated from thefirst controller provided in the data PCB to the plural gate driving ICsthrough the first and second control signal lines mounted together withthe LOG lines mounted at an outer side of the image display part of theliquid crystal display panel.

[0073] It will be apparent to those skilled in the art that variousmodifications and variations can be made in the liquid crystal displaydevice of the present invention without departing from the spirit orscope of the inventions. Thus, it is intended that the present inventioncovers the modifications and variations of this invention provided theycome within the scope of the appended claims and their equivalents.

What is claimed is:
 1. A liquid crystal display device, comprising: animage display part formed on a first substrate where data lines and gatelines are vertically and horizontally arranged, respectively, tointersect each other; a plurality of gate tape carrier packages having agate driving integrated circuit for driving the gate lines; a pluralityof data tape carrier packages having a data driving integrated circuitfor driving the data lines; a plurality of conductive lines formed at anouter side of the image display part of the first substrate forsupplying gate driving signals to the gate driving integrated circuits;a first control signal line formed together with the conductive linesfor supplying a first control signal to the gate driving integratedcircuits so that the gate lines of the image display part may besequentially driven from the first one to the last one; a second controlsignal line formed together with the conductive lines for supplying asecond control signal to the gate driving integrated circuits so thatthe gate lines of the image display part may be sequentially driven fromthe last one to the first one; and a first controller for supplying thefirst and second control signals to the first and second control signallines.
 2. The device according to claim 1, wherein the first controlsignal line transmits a gate start pulse (GSP).
 3. The device accordingto claim 1, further comprising a shorting line mounted at an edge of thefirst substrate to electrically connect an end of the first controlsignal line and an end of the second control signal line extended fromthe last gate driving IC.
 4. The device according to claim 1, whereinthe first controller transmits a third control signal to the first datadriving IC and the last data driving IC to sequentially apply imageinformation from the first data driving IC to the last data driving ICor from the last data driving IC to the first data driving IC.
 5. Amethod of driving a liquid crystal display device, comprising: providinga plurality of gate tape carrier packages having a gate drivingintegrated circuit for driving a plurality of gate lines; providing aplurality of data tape carrier packages having a data driving integratedcircuit for driving a plurality of data lines; providing a plurality ofconductive lines at an outer side of an image display part of a firstsubstrate for supplying gate driving signals to the gate drivingintegrated circuits; and supplying a first control signal to the gatedriving integrated circuits using a first control line so that the gatelines of the image display part may be sequentially driven from the lastone to the first one.
 6. The method according to claim 5, wherein animage produced by supplying the first control signal is inverted.
 7. Themethod according to claim 5, further comprising: supplying a secondcontrol signal to the data driving integrated circuits using a secondcontrol line so that the data lines of the image display part may besequentially driven from the last one to the first one.
 8. The methodaccording to claim 7, wherein an image produced by supplying the secondcontrol signal is reversed.
 9. The method according to claim 5, whereinthe first control signal line transmits a gate start pulse (GSP). 10.The method according to claim 5, further comprising providing a shortingline at an edge of the first substrate to electrically connect an end ofthe first control signal line and an end of the second control signalline extended from the last gate driving IC.
 11. The method according toclaim 5, wherein the first controller transmits a third control signalto the first data driving IC and the last data driving IC tosequentially apply image information from the first data driving IC tothe last data driving IC or from the last data driving IC to the firstdata driving IC.
 12. A method of driving a liquid crystal displaydevice, comprising: providing a liquid crystal display device including:an image display part formed on a first substrate where data lines andgate lines are vertically and horizontally arranged, respectively, tointersect each other; a plurality of gate tape carrier packages having agate driving integrated circuit for driving the gate lines; a pluralityof data tape carrier packages having a data driving integrated circuitfor driving the data lines; and a plurality of conductive lines mountedat an outer side of the image display part of the first substrate forsupplying gate driving signals to the gate driving integrated circuits;and supplying a first control signal to the gate driving integratedcircuits using a first control line so that the gate lines of the imagedisplay part may be sequentially driven from the last one to the firstone.
 13. The method according to claim 12, wherein an image produced bysupplying the first control signal is inverted.
 14. The method accordingto claim 12, further comprising: supplying a second control signal tothe data driving integrated circuits using a second control line so thatthe data lines of the image display part may be sequentially driven fromthe last one to the first one.
 15. The method according to claim 14,wherein an image produced by supplying the second control signal isreversed.
 16. The method according to claim 12, wherein the firstcontrol signal line transmits a gate start pulse (GSP).
 17. The methodaccording to claim 12, further comprising providing a shorting line atan edge of the first substrate to electrically connect an end of thefirst control signal line and an end of the second control signal lineextended from the last gate driving IC.
 18. The method according toclaim 12, wherein the first controller transmits a third control signalto the first data driving IC and the last data driving IC tosequentially apply image information from the first data driving IC tothe last data driving IC or from the last data driving IC to the firstdata driving IC.